the particles and flakes (and sometimes small nuggets) of gold obtained in placer mining
双语例句
用作名词 (n.)
Tibet plans to ban the mining of mercury, arsenic, peat and gold dust in the region to protect its ecological environment. 西藏计划取缔对汞，砷，泥煤，砂金在其区域的开采，以保护环境。
